(Photo) thermographic material with a blue background

Abstract

A (photo)thermographic recording material comprising a substantially colourless support and a (photo-addressable) thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent for the substantially light-insensitive organic silver salt in thermal working relationship therewith (, photosensitive silver halide is catalytic association with the substantially light-insensitive organic silver salt) and a binder, characterized in that a blue pigment or dye having a maximum absorption wavelength of from 550 to 700 nm is present in the thermosensitive element and/or any other layer on either side of the support which provides a background for viewing in transmission images produced with the (photo) thermographic recording material; and a (photo)thermographic recording process therefor.

What is claimed is:  
     
       1. A photothermographic recording material excluding a palladium compound comprising a substantially colourless support and a photo-addressable thermally developable element, said photo-addressable thermally developable element for said substantially light-insensitive organic silver salt in thermal working relationship therewith, photosensitive silver halide in catalytic association with said substantially light-insensitive organic silver salt and a binder, wherein a blue pigment or dye having an absorption maximum in the wavelength range from 550 to 700 nm is uniformly distributed in said photo-addressable thermally developable element and/or any other layer on either side of said support, wherein an antihalation dye is present in said photo-addressable thermally developable element and/or any other layer on either side of said support, and wherein a useable image is produceable with said photothermographic recording material in its entirety. 
     
     
       2. The photothermographic recording material according to  claim 1 , wherein said blue pigment or dye has an absorption maximum in the wavelength range from 570 to 630 nm. 
     
     
       3. The photothermographic recording material according to  claim 1 , wherein said blue pigment or dye is selected from the group consisting of phthalocyanine dyes, phthalocyanine pigments, indanthrone dyes and indanthrone pigments. 
     
     
       4. A photothermographic recording process comprising the steps of: 
       (a) bringing a photothermographic recording material excluding a palladium compound, comprising a substantially colourless support and a photo-addressable thermally developable element, said photo-addressable thermally developable element containing a substantially light-insensitive organic silver salt, and organic reducing agent for said substantially light-insensitive organic silver salt in thermal working relationship therewith, photosensitive silver halide in catalytic association with said substantially light-insensitive organic silver salt and a binder, into the proximity of a source of actinic radiation;  
       (b) image-wise exposing said photothermographic recording material with said source of actinic radiation;  
       (c) bringing said image-wise exposed photothermographic recording material into the proximity of a heat source;  
       (d) uniformly heating said image-wise exposed photothermographic recording material to produce an image; and  
       (e) removing said photothermographic recording material from said heat source, wherein a blue pigment or dye having an absorption maximum in the wavelength range from 550 to 700 nm is uniformly distributed in said photo-addressable thermally developable element and/or any other layer on either side of said support, wherein an antihalation dye is present in said photo-addressable thermally developable element and/or any other layer on either side of said support, and said image produced by said photothermographic recording process is usable.